LI Yanjun. Support technology of large span open-off cut under compound roof in mining soft coal seam[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(4): 147-153. DOI: 10.3969/j.issn.1001-1986.2018.04.024
Citation: LI Yanjun. Support technology of large span open-off cut under compound roof in mining soft coal seam[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(4): 147-153. DOI: 10.3969/j.issn.1001-1986.2018.04.024

Support technology of large span open-off cut under compound roof in mining soft coal seam

Funds: 

The Shannxi Province Natural Science Basic Research Project(2016JQ5019)

More Information
  • Received Date: February 11, 2018
  • Published Date: August 24, 2018
  • In order to study the support technology of large span open-off cut under the condition of compound roof in mining soft coal seam, numerical calculation, theoretical analysis, and site measurement were applied to research the deformation, displacement and failure characteristics of large span open-off cut. The surrounding rock type and support parameters were identified, and the combined support with left-hand rebar bolt, metal net, metal beam and anchor was designed. The results show that there was butterfly destruction under surrounding rock of open-off cut under no-support condition, and the roof and walls of open-off cut were critical zones of support. After supportting, the displacement of roof and walls of open-off cut reduced, the vertical stress in stress relief area of roof was obviously reduced, and the vertical stress in stress concentration area of walls increased. The range of the shear stress concentration zone formed at the vertex angle and the bottom angle of open-off cut is reduced. The results of on-site monitoring show that the support can meet the safety production and provide reference to roadway support under similar geological conditions.
  • [1]
    蒋力帅,马念杰,白浪,等. 巷道复合顶板变形破坏特征与冒顶隐患分级[J]. 煤炭学报,2014,39(7):1205-1211.

    JIANG Lishuai,MA Nianjie,BAI Lang,et al. Deformation and failure characteristics and roof caving hidden danger classification of roadways compound roof[J]. Journal of China Coal Society,2014,39(7):1205-1211.
    [2]
    赵国栋. 巨厚复合顶煤大断面煤巷围岩控制技术研究[D]. 北京:中国矿业大学(北京),2011.
    [3]
    柏建彪,侯朝炯,杜木民,等. 复合顶板极软煤层巷道锚杆支护技术研究[J]. 岩石力学与工程学报,2001,20(1):53-56.

    BAI Jianbiao,HOU Chaojiong,DU Mumin,et al. On bolting support of roadway in extremely soft seam of coal mine with complex roof[J]. Chinese Journal of Rock Mechanics and Engineering,2001,20(1):53-56.
    [4]
    SOFIANOS A I,KAPENIS A P. Numerical evaluation of the response in bending of an underground hard rock voussoir beam roof[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics,1998,35(8):1071-1086.
    [5]
    SOFIANOS A I. Analysis and design of an underground hard rock voussoir beam roof[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics,1996,33(2):153-166.
    [6]
    吴德义,申法建. 巷道复合顶板层间离层稳定性量化判据选择[J]. 岩石力学与工程学报,2014,33(10):2040-2046.

    WU Deyi,SHEN Fajian. Quantitative criteria of interlayer separation stability of complex roof in tunnels[J]. Chinese Journal of Rock Mechanics and Engineering,2014,33(10):2040-2046.
    [7]
    岳中文,杨仁树,闫振东,等. 复合顶板大断面煤巷围岩稳定性试验研究[J]. 煤炭学报,2011,36(增刊1):47-52.

    YUE Zhongwen,YANG Renshu,YAN Zhendong,et al. Experimental study on stability of surrounding rock of coal roadway with compound roof and large cross section[J]. Journal of China Coal Society,2011,36(S1):47-52.
    [8]
    娄金福. 复合顶板动压巷道变形响应特征与失稳机理研究[J]. 煤炭科学技术,2016,44(10):112-119.

    LOU Jinfu. Study on deformation response features and instability mechanism of complex roof dynamic roadway[J]. Coal Science and Technology,2016,44(10):112-119.
    [9]
    苏学贵,宋选民,李浩春,等. 特厚松软复合顶板巷道拱-梁耦合支护结构的构建及应用研究[J]. 岩石力学与工程学报, 2014,33(9):1828-1836.

    SU Xuegui,SONG Xuanmin,LI Haochun,et al. Study on coupled arch-beam support structure of roadway with extra-thick soft compound roof[J]. Chinese Journal of Rock Mechanics and Engineering,2014,33(9):1828-1836.
    [10]
    崔千里,何杰,郝登云,等. 大断面复合顶板煤巷破坏特征及支护策略[J]. 煤炭技术,2016,35(12):29-31.

    CUI Qianli,HE Jie,HAO Dengyun,et al. Research on failure feature and support strategy of coal roadway with large section and compound roof[J]. Coal Technology,2016,35(12):29-31.
    [11]
    常聚才. 深井复合顶板回采巷道支护技术研究[J]. 煤炭科学技术,2016,44(6):60-63.

    CHANG Jucai. Study on complex roof support technology of mining gateway in deep mine[J]. Coal Science and Technology, 2016,44(6):60-63.
    [12]
    徐青云,张磊,高明仕,等. 深井复合顶大断面煤巷支护参数优化研究[J]. 煤炭工程,2015,47(5):39-41.

    XU Qingyun,ZHANG Lei,GAO Mingshi,et al. Optimization on support parameters of large section coal roadway with composte roof in deep mine[J]. Coal Engineering,2015,47(5):39-41.
  • Cited by

    Periodical cited type(1)

    1. 何胜,汪万录,赵文强,潘军. 综合地球物理方法在Ⅱ-3型地热勘查中的应用:以青海同仁盆地为例. 科学技术与工程. 2024(09): 3567-3575 .

    Other cited types(1)

Catalog

    Article Metrics

    Article views (129) PDF downloads (5) Cited by(2)
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return